apomixisPronunciation: /ˌapəˈmɪksɪs/Definition of apomixis noun [mass noun] Botany asexual reproduction in plants, in particular agamospermy. Often contrasted with amphimixis.Derivatives apomictic adjective Origin: early 20th century: from apo- + Greek mixis 'mingling'apomixis in other Oxford dictionaries Definition of apomixis in the US English dictionary